2011A&A...526A.128K

Query : 2011A&A...526A.128K

2011A&A...526A.128K - Astronomy and Astrophysics, volume 526A128-128 (2011/2-1)

Gemini GMOS spectroscopy of HeII nebulae in M33.

KEHRIG C., OEY M.S., CROWTHER P.A., FOGEL J., PELLEGRINI E., SCHNURR O., SCHAERER D., MASSEY P. and ROTH K.

Abstract (from CDS):

We have carried out a narrow-band survey of the Local Group galaxy, M33, in the HeII λ4686 emission line, to identify HeII nebulae in this galaxy. With spectroscopic follow-up observations, we confirm three of seven candidate objects, including identification of two new HeII nebulae, BCLMP651, HBW673. We also obtain spectra of associated ionizing stars for all the HII regions, identifying two new WN stars. We demonstrate that the ionizing source for the known HeII nebula, MA 1, is consistent with being the early-type WN star MC8 (M33-WR14), by carrying out a combined stellar and nebular analysis of MC8 and MA 1. We were unable to identify the helium ionizing sources for HBW 673 and BCLMP 651, which do not appear to be Wolf-Rayet stars. According to the [OIII]λ5007/Hβ vs. [NII]λ6584/Hα diagnostic diagram, excitation mechanisms apart from hot stellar continuum are needed to account for the nebular emission in HBW 673, which appears to have no stellar source at all.

Abstract Copyright: ∼

Journal keyword(s): stars: atmospheres - stars: Wolf-Rayet - HII regions - ISM: lines and bands - galaxies: individual: M33 - galaxies: star formation

CDS comments: Paragraph 1. S3 in IC 1613 is [S71b] HII 3 in SIMBAD.

Simbad objects: 62

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Number of rows : 62
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SMC AB 10 WR* 00 45 28.9085871312 -73 04 45.621712056 14.69 15.81 15.55   15.96 WN3ha 25 0
2 NGC 249 HII 00 45 30.2 -73 04 47           ~ 35 0
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
4 SMC AB 7 WR* 01 03 35.9241336168 -72 03 22.118601312 11.933 12.954 13.016   13.32 WN4+O6I(f) 58 0
5 SNR B0102-72.3 SNR 01 04 01.2 -72 01 52           ~ 422 1
6 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
7 [HLG90] 37 HII 01 05 03.3 +02 04 24           ~ 19 0
8 LGGS J013302.28+301119.1 WR* 01 33 02.2479853896 +30 11 18.908647332 18.598 19.607 19.874 19.960 20.021 WN3 2 0
9 [MC83] 8 WR* 01 33 02.9152047336 +30 11 22.538032800 15.587 16.217 16.144 16.040   WNE 8 0
10 LGGS J013303.19+301124.2 WR* 01 33 03.1649970432 +30 11 23.928240228 16.119 17.105 17.228 17.251 17.275 WNE 8 0
11 BCLMP 220 HII 01 33 11.12 +30 27 39.7     14.8     ~ 10 0
12 BCLMP 45 HII 01 33 29.20 +30 40 25.4 15.58 15.55 15.66 15.72 15.97 ~ 19 0
13 [AM85] M 33 5 WR* 01 33 33.31 +30 41 29.7 18.686 19.446 19.344 18.966 19.685 WC6 10 0
14 LGGS J013333.46+304129.8 * 01 33 33.42 +30 41 29.7 18.246 19.054 19.345 18.848 18.925 ~ 2 0
15 NGC 595 HII 01 33 33.53 +30 41 29.8           ~ 213 0
16 LGGS J013333.66+304129.8 * 01 33 33.66 +30 41 29.8 18.158 19.109 19.015 18.957 19.010 O 1 0
17 DMS NGC 595 9 WR* 01 33 33.81 +30 41 29.6 18.785 20.48 19.03 18.832 18.596 WN7 7 0
18 DMS NGC 595 8 WR* 01 33 33.96 +30 41 17.3 19.63 20.24 19.93     WN 6 0
19 [AM85] M 33 7 WR* 01 33 34.38 +30 41 30.2 20.224 21.491 20.987 19.889   WN8 6 0
20 VGHC 2-40 HII 01 33 34.7 +30 32 13     14.7     ~ 12 0
21 FSZ 207 WR* 01 33 43.19 +30 39 06.2 15.943 16.829 16.846 16.771 16.653 WN7 9 0
22 BCLMP 40 HII 01 33 43.42 +30 39 05.8     16.1     ~ 6 0
23 BCLMP 38 HII 01 33 43.85 +30 38 45.8     13.9     ~ 8 0
24 [MC83] 45 WR* 01 33 44.3906340072 +30 38 43.871534232 17.541 17.467 21.040 18.065 17.789 WC4 16 0
25 HBW 673 HII 01 33 49.5 +30 33 14           ~ 5 0
26 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
27 CPSDP 1A HII 01 33 59.72 +30 34 35.4     13.6     ~ 6 0
28 BCLMP 90 HII 01 34 04.15 +30 38 08.2           ~ 12 0
29 [HS80] B517 WR* 01 34 16.07 +30 36 42.1 16.80 17.89 17.95 17.86 17.83 Ofpe/WN9 21 0
30 BCLMP 720 HII 01 34 16.21 +30 36 44.7     15.3     ~ 5 0
31 LGGS J013416.28+303646.4 WR* 01 34 16.2585666312 +30 36 46.254377196 19.239 19.717 19.945 19.744 19.612 WC5 14 0
32 VGHC 2-99 HII 01 34 17.3 +30 33 36     12.4     ~ 9 0
33 LGGS J013422.37+303313.7 WR* 01 34 22.3340077320 +30 33 13.467355452 17.268 17.997 18.107 18.076 17.590 WN4 4 1
34 [MC83] 72 WR* 01 34 22.5164762040 +30 33 16.854303816 19.774 20.519 20.688 20.628 20.620 WN4 6 0
35 BCLMP 715 HII 01 34 22.73 +30 33 15.0           ~ 5 0
36 LGGS J013429.44+305719.2 * 01 34 29.44 +30 57 19.2 19.529 20.562 20.697 20.772 20.745 ~ 1 0
37 LGGS J013429.65+305711.2 * 01 34 29.60 +30 57 12.6 19.396 20.124 20.382 20.302 20.622 ~ 3 0
38 BCLMP 651 HII 01 34 29.71 +30 57 14.4     15.3     ~ 15 0
39 HD 9974 WR* 01 38 55.6274097096 +58 09 22.673806272 9.85 10.71 10.69     WN3h-w 173 0
40 Brey 2 WR* 04 49 36.2527075920 -69 20 54.744608760 15.633 16.495 16.579   16.447 WN2b(h) 39 0
41 LHA 120-N 79 HII 04 52 00 -69 22.5           ~ 75 1
42 IC 2127 EmO 05 22 12.532 -67 58 31.92     11.60     ~ 107 1
43 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
44 X LMC X-5 X 05 26 -68.4           ~ 12 0
45 Brey 40a WR* 05 29 33.2070992328 -70 59 34.838770092 12.472 13.20 13.39 13.90 13.743 WN4:b+O8V 46 0
46 LHA 120-N 206A HII 05 31 56.0 -71 00 19           ~ 123 2
47 HD 269828 WR* 05 35 58.8736700492 -69 11 47.838658000     13.031   12.837 WN7+O3 84 0
48 Brey 73 WR* 05 37 46.3440 -69 09 09.360   12.222 12.11     WN6(h) 40 1
49 X LMC X-1 HXB 05 39 38.8284304464 -69 44 35.531553624   14.8 14.5 14.924   O8(f)p 700 0
50 LHA 120-N 159 HII 05 39 46.650 -69 45 39.94           ~ 293 2
51 NGC 2078 EmO 05 39 54 -69 44.9   11.01 10.89     ~ 30 0
52 HD 50896 WR* 06 54 13.0439608392 -23 55 42.023319852 5.74 6.63 6.91 7.74   WN4b 794 0
53 Mrk 116 AGN 09 34 02.1 +55 14 25           ~ 1179 1
54 NGC 5253 rG 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1421 4
55 Z 193-4 H2G 14 50 56.495 +35 34 18.27   14.5 14.83     ~ 212 0
56 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
57 V* V3893 Sgr WR* 17 45 47.5405102320 -26 10 26.779355616   15.13 14.20 14.23   WR 126 1
58 SNR G002.4+01.4 HII 17 45 50.0 -26 14 28           ~ 58 2
59 PN M 4-9 PN 18 14 18.41 -04 59 22.1     16.6     ~ 79 0
60 BD+28 4211 HS* 21 51 11.0221915656 +28 51 50.367627468 8.922 10.25 10.58 10.656 10.831 sdO2VIIIHe5 837 0
61 BD+25 4655 HS* 21 59 41.9748629928 +26 25 57.403455672 8.27 9.39 9.68     sdO6 130 0
62 NAME Local Group GrG ~ ~           ~ 9325 0

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